VEX Robotics will be closed in observance of Thanksgiving on Thursday, November 22nd, and Friday, November 23rd. Our office will re-open on Monday, November 26th.

Be advised that FedEx will be closed for delivery on Thursday, 11/22. For example, a Next-Day Air order placed by 2:00 PM CST on Wednesday, 11/21, will be delivered on Friday, 11/23. Orders placed after 2:00 PM CST on Wednesday will process and ship out Monday, 11/26, to then be delivered according to the selected shipping speed.

We appreciate your understanding and wish all VEX users a happy holiday!

Chassis Kits (4-sizes)

Chassis Kits (4-sizes)

Standard VEX chassis kits include (2) bumpers and (4) rails apiece. The flexibility and variety of design options makes these a great starting point for any mobile robot project.

Note: Chassis sizes are listed by number of VEX holes, (i.e. a 15 x 25 chassis is 15-holes wide x 25-holes long).
  • Rail mounting locations allow for variable chassis width
  • Space between rails is ideal for a protected chain run or gear reduction
  • Wheels may be mounted outboard or between the rails for extra support
  • "Super" chassis is taller with more vertical mounting locations
  • Rails sold separately for additional versatility

Availability: In stock

Product Name Availability Price Qty
15x16 Chassis Kit (Small)

In Stock

25x25 Chassis Kit (Medium)

In Stock

35x35 Chassis Kit (Large)

In Stock

35x35 Chassis Kit (Super)




Kit Contents
  • (2) Bumpers
  • (4) Rails
CAD File
  • 15x16 Chassis Kit (Small) - 0.84 lbs
  • 25x25 Chassis Kit (Medium) - 1.3 lbs
  • 35x35 Chassis Kit (Large) - 1.8 lbs
  • 35x35 Chassis Kit (Super) - 2.95 lbs
Material Thickness
  • 0.046" (1.17mm)
Material Finish
  • Zinc Plated
Material Type
  • Cold Rolled Steel per ASTM A-1008 CS Type B (approx 40ksi tensile strength)
Hole Size
  • 0.182 square (VEX standard)